JPH08246947A - Manufacture of piston - Google Patents
Manufacture of pistonInfo
- Publication number
- JPH08246947A JPH08246947A JP7052155A JP5215595A JPH08246947A JP H08246947 A JPH08246947 A JP H08246947A JP 7052155 A JP7052155 A JP 7052155A JP 5215595 A JP5215595 A JP 5215595A JP H08246947 A JPH08246947 A JP H08246947A
- Authority
- JP
- Japan
- Prior art keywords
- piston
- groove
- build
- layer
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
- B23K35/286—Al as the principal constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/302—Cu as the principal constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/10—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/02—Light metals
- F05C2201/021—Aluminium
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49249—Piston making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49249—Piston making
- Y10T29/49265—Ring groove forming or finishing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Laser Beam Processing (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、内燃機関のピストンの
製造方法に関し、特にピストンリングが装着されるリン
グ溝近傍の耐熱性，耐摩耗性の向上のためにその部分を
複合構造化する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a piston of an internal combustion engine, and more particularly to a method for forming a composite structure on the piston ring in order to improve heat resistance and wear resistance in the vicinity of the ring groove. Regarding
【０００２】[0002]
【従来の技術】この種のピストンの製造方法として特開
平２−１２５９５２号公報に記載されているものがあ
る。2. Description of the Related Art As a method of manufacturing a piston of this type, there is one described in Japanese Patent Laid-Open No. 125952/1990.
【０００３】この特開平２−１２５９５２号公報に記載
された技術では、図３に示すように、アルミニウム合金
よりなるピストン１１の外周面１１ａであって最終的に
ピストンリング装着用のリング溝１２（同図（Ｃ）参
照）が形成される部分に予め溝１３を形成するととも
に、この溝１３に銅線材１４を挿嵌した上で電子ビーム
を照射することによりアルミニウム−銅合金層として得
られる溶融拡散層１５を形成し、その後に溶融拡散層１
５に溝加工を施して同図（Ｃ）に示すようなリング溝１
２を形成するものである。According to the technique disclosed in Japanese Patent Laid-Open No. 125952/1990, as shown in FIG. 3, the outer peripheral surface 11a of the piston 11 made of an aluminum alloy, and finally the ring groove 12 for mounting the piston ring ( A groove 13 is formed in advance in a portion where the same (C) is formed, and a copper wire 14 is inserted into the groove 13 and irradiated with an electron beam to obtain a molten aluminum-copper alloy layer. The diffusion layer 15 is formed, and then the fusion diffusion layer 1 is formed.
5 is grooved to give a ring groove 1 as shown in FIG.
2 is formed.
【０００４】[0004]
【発明が解決しようとする課題】上記のような従来の方
法では、ピストン１１の母材であるアルミニウム合金と
の合金化のために銅の含有量を増加させると、アルミニ
ウムと銅との間で脆い金属間化合物を形成することか
ら、耐熱性，耐摩耗性の上では高いほど有利とされる銅
の含有率は１０〜３５％程度に制限される。そのため、
前述したようにアルミニウム−銅合金層として得られる
溶融拡散層１５のマトリックス（母相）は基本的にはア
ルミニウムベースとなり、したがってそのα相と鋳鉄製
のピストンリングとの間で凝着摩耗を引き起こしやす
く、耐摩耗性の面で必ずしも充分に満足できるものでは
なかった。In the conventional method as described above, when the content of copper is increased for alloying with the aluminum alloy which is the base material of the piston 11, the copper content between the aluminum and the copper is increased. Since a brittle intermetallic compound is formed, the content of copper, which is more advantageous in terms of heat resistance and wear resistance, is limited to about 10 to 35%. for that reason,
As described above, the matrix (matrix) of the melt diffusion layer 15 obtained as the aluminum-copper alloy layer is basically aluminum-based and therefore causes adhesive wear between the α phase and the cast iron piston ring. It was easy and not always satisfactory in terms of wear resistance.
【０００５】本発明は以上のような課題に着目してなさ
れたもので、その目的とするところは、ピストンリング
との間の凝着摩耗の発生を抑制して、耐摩耗性の向上を
図ったピストンの製造方法を提供することにある。The present invention has been made in view of the above problems, and an object thereof is to suppress the occurrence of cohesive wear with a piston ring to improve wear resistance. Another object of the present invention is to provide a method of manufacturing a piston.
【０００６】[0006]
【課題を解決するための手段】請求項１に記載の発明
は、アルミニウム合金よりなるピストンの外周面にその
円周方向に沿って周溝を形成する工程と、前記周溝に銅
系合金材料の粉末を連続供給しながらレーザビームを照
射するとともにピストンとレーザビームとを相対移動さ
せることにより、前記粉末を溶融させて周溝に沿って肉
盛り層を形成する工程と、前記肉盛り加工後にその肉盛
り層に機械加工を施して、ピストンリングを装着するた
めのリング溝を形成する工程とを含んでいることを特徴
としている。According to a first aspect of the present invention, there is provided a step of forming a circumferential groove on an outer peripheral surface of a piston made of an aluminum alloy along a circumferential direction thereof, and a copper alloy material in the circumferential groove. Of irradiating a laser beam while continuously supplying the powder of, and by relatively moving the piston and the laser beam, a step of melting the powder to form a build-up layer along a circumferential groove, and after the build-up processing. And a ring groove for mounting the piston ring is formed by machining the padding layer.
【０００７】請求項２に記載の発明は、請求項１に記載
の構成に加えて、前記周溝の溝幅および溝深さがともに
リング溝よりも大きく設定されていることを特徴として
いる。The invention described in claim 2 is characterized in that, in addition to the configuration described in claim 1, both the groove width and the groove depth of the circumferential groove are set to be larger than that of the ring groove.
【０００８】請求項３に記載の発明は、請求項１または
２に記載の構成に加えて、前記肉盛り加工は、周溝の全
周に肉盛り層が形成されるのを一回として複数回行うこ
とを特徴としている。According to a third aspect of the present invention, in addition to the structure according to the first or second aspect, the build-up processing is performed by forming a build-up layer on the entire circumference of the circumferential groove at one time. The feature is that it is performed once.
【０００９】請求項４に記載の発明は、請求項３に記載
の構成に加えて、前記肉盛り加工を複数回行う際に、一
回ごとに肉盛り層を含むピストン全体を冷却することを
特徴としている。According to a fourth aspect of the present invention, in addition to the structure of the third aspect, when the build-up process is performed a plurality of times, the entire piston including the build-up layer is cooled once. It has a feature.
【００１０】[0010]
【作用】請求項１に記載の発明によると、銅系合金材料
の粉末をレーザビームエネルギーにより溶融させて肉盛
りする方式であるため、ピストンに、銅含有率が７０％
以上でかつマトリックスが銅ベースの合金の層を接合す
ることができる。これにより、ピストンリングとの間の
凝着摩耗が抑制され、特に耐摩耗性が大幅に向上するよ
うになる。According to the first aspect of the present invention, since the powder of the copper-based alloy material is melted by the laser beam energy and built up, the content of copper in the piston is 70%.
Above, the matrix can bond layers of copper-based alloys. As a result, adhesion wear between the piston ring and the piston ring is suppressed, and especially wear resistance is greatly improved.
【００１１】請求項２に記載の発明によると、銅系合金
の肉盛り層が形成される周溝の溝幅および溝深さが、と
もにリング溝のそれよりも予め大きくなるように設定さ
れているため、その肉盛り層に機械加工を施すことによ
って形成されるところのリング溝の周囲には満遍なく銅
系合金層が形成され、より一層の耐摩耗性の向上が図れ
るようになる。According to the second aspect of the present invention, both the groove width and the groove depth of the peripheral groove in which the copper alloy build-up layer is formed are set to be larger than that of the ring groove in advance. Therefore, the copper-based alloy layer is evenly formed around the ring groove, which is formed by machining the buildup layer, and the wear resistance can be further improved.
【００１２】請求項３に記載の発明によると、周溝の全
周に肉盛りするための加工を複数回行うことにより、よ
り大きな肉盛り層の厚みを確保できるほか、一回の肉盛
り加工で所定の厚みを得ようとすると、例えば母材側の
熱容量の小さい部分では粉末の溶融と同時に母材側まで
溶融して、肉盛り層の中に母材質が溶け込んでいわゆる
母材希釈と称される欠陥が発生することがあるが、請求
項３に記載の発明ではそのような不具合がなくなる。According to the third aspect of the present invention, a larger thickness of the buildup layer can be ensured by performing the workup to build up the entire circumference of the circumferential groove a plurality of times, and the buildup process can be performed once. In order to obtain a predetermined thickness with, for example, in the part with a small heat capacity on the base metal side, the powder melts up to the base metal side at the same time, and the base material melts into the buildup layer. However, in the invention described in claim 3, such a defect disappears.
【００１３】請求項４に記載の発明によると、上記の肉
盛り加工を複数回行う際に、一回の肉盛り加工ごとにそ
の都度ピストン全体を冷却させることにより、例えば二
回目の肉盛り加工の際にその前の肉盛り加工時の熱的影
響を受けることがなくなり、特に母材側の熱容量が小さ
い部分での上記の母材希釈等の欠陥をより一層防止でき
るようになる。According to the invention described in claim 4, when the above-mentioned build-up processing is performed a plurality of times, by cooling the entire piston each time the build-up processing is performed once, for example, the second build-up processing is performed. In this case, the thermal influence during the overlaying process before that is not affected, and it becomes possible to further prevent defects such as the above-mentioned dilution of the base material particularly in the portion where the heat capacity on the base material side is small.
【００１４】[0014]
【実施例】図１は本発明の一実施例を示す図であって、
図２に示すようにピストン１のトップリングが装着され
るリング溝２の周囲に銅系合金層３を形成する場合の例
を示している。FIG. 1 is a diagram showing an embodiment of the present invention.
As shown in FIG. 2, an example is shown in which the copper-based alloy layer 3 is formed around the ring groove 2 in which the top ring of the piston 1 is mounted.
【００１５】図１に示すように、ピストン１の外周面１
ａのうちトップリング用のリング溝２が形成される部分
に、その円周方向に沿って断面略逆台形状の周溝４を予
め形成しておく。As shown in FIG. 1, the outer peripheral surface 1 of the piston 1
A peripheral groove 4 having a substantially inverted trapezoidal cross section is formed in advance in a portion of a where the ring groove 2 for the top ring is formed along the circumferential direction thereof.
【００１６】そして、ピストン１を図示外の治具に位置
決め固定し、周溝４に対して粉末供給ノズル５から銅系
合金材料の粉末６を連続供給してその周溝４を粉末６で
満たしながら、該粉末６の上からレーザビーム７を照射
する一方、同時にピストン１をその軸心を回転中心とし
て所定速度で回転させてそのピストン１とレーザビーム
７とを相対回転させる。Then, the piston 1 is positioned and fixed to a jig (not shown), and the powder 6 of the copper alloy material is continuously supplied to the peripheral groove 4 from the powder supply nozzle 5 to fill the peripheral groove 4 with the powder 6. While irradiating the laser beam 7 from above the powder 6, at the same time, the piston 1 and the laser beam 7 are relatively rotated by rotating the piston 1 at a predetermined speed with its axis as the center of rotation.
【００１７】これにより、周溝４に盛られた粉末６をレ
ーザビームエネルギーにより一旦溶融させた上で固化さ
せて、周溝４に沿って銅系合金の肉盛り層８を形成す
る。As a result, the powder 6 piled up in the circumferential groove 4 is once melted by the laser beam energy and then solidified to form the built-up layer 8 of the copper-based alloy along the circumferential groove 4.
【００１８】その後、肉盛り層８を充分に冷却させた上
で肉盛り層８に機械加工を施し、その肉盛り層８がピス
トン１の外周面１ａと面一となるように切削して銅系合
金層３とし、同時に図１のほか図２に示すようにその銅
系合金層３にリング溝２を切削加工する。なお、ピスト
ン１にはセカンドリング用のリング溝９も同時に加工さ
れることは言うまでもない。After that, the build-up layer 8 is sufficiently cooled, and then the build-up layer 8 is machined, and cut so that the build-up layer 8 is flush with the outer peripheral surface 1a of the piston 1. At the same time as the system alloy layer 3, the ring groove 2 is cut in the copper system alloy layer 3 as shown in FIG. 1 and FIG. It goes without saying that the ring groove 9 for the second ring is also machined in the piston 1 at the same time.
【００１９】本実施例では、ＡＣ８Ｃ材（ＪＩＳ規格）
よりなるアルミニウム合金製のピストン１の外周面１ａ
に、溝幅Ｗ1が７．５ｍｍ、溝深さＨ1が４．５ｍｍ、開
先角度θが６０°の断面略逆台形状の周溝４を形成し、
その周溝４に粉末供給ノズル５からアルミブロンズの粉
末を５０ｇ／ｍｉｎで連続供給しながら、レーザ出力
４．０ｋＷのレーザビーム７を照射して肉盛り加工を行
って肉盛り層８を形成した。ここで使用されるアルミブ
ロンズの粉末は、例えば、Ａｌ−１０％、Ｎｉ−５％、
Ｆｅ−３％、Ｃｕ−残部、の組成のものとした。In this embodiment, AC8C material (JIS standard)
Outer surface 1a of piston 1 made of aluminum alloy
To form a circumferential groove 4 having a substantially inverted trapezoidal cross section with a groove width W 1 of 7.5 mm, a groove depth H 1 of 4.5 mm, and a groove angle θ of 60 °.
While continuously supplying aluminum bronze powder at a rate of 50 g / min from the powder supply nozzle 5 to the circumferential groove 4, a laser beam 7 having a laser output of 4.0 kW was applied to perform a buildup process to form a buildup layer 8. . The aluminum bronze powder used here is, for example, Al-10%, Ni-5%,
The composition was Fe-3% and Cu-balance.
【００２０】レーザビーム７は、照射位置での形状が
７．５ｍｍ×２ｍｍの長方形状となるように形成した上
で、その長辺を周溝４の溝幅方向と一致させて照射し
た。The laser beam 7 was formed so as to have a rectangular shape of 7.5 mm × 2 mm at the irradiation position, and its long side was irradiated so as to match the groove width direction of the circumferential groove 4.
【００２１】上記の肉盛り加工は二回行い、一回目の肉
盛り加工後であって二回目の肉盛り加工開始前に肉盛り
層８を含むピストン１全体を充分に冷却させた。なお、
図１の（Ａ）に示すように一回目にできた肉盛り層を符
号８ａで示し、二回目にできた肉盛り層を符号８ｂで示
す。The above-mentioned build-up process was performed twice, and the entire piston 1 including the build-up layer 8 was sufficiently cooled after the first build-up process and before the start of the second build-up process. In addition,
As shown in FIG. 1 (A), the first build-up layer is indicated by reference numeral 8a, and the second build-up layer is indicated by reference numeral 8b.
【００２２】その後、肉盛り層８がピストン１の外周面
１ａと面一となるように切削加工を施して銅系合金層３
とし、この銅系合金層３に溝幅Ｗ2が１．５ｍｍで溝深
さＨ2が３．５ｍｍのリング溝２を形成した。After that, cutting work is performed so that the buildup layer 8 is flush with the outer peripheral surface 1a of the piston 1, and the copper alloy layer 3 is formed.
A ring groove 2 having a groove width W 2 of 1.5 mm and a groove depth H 2 of 3.5 mm was formed in the copper-based alloy layer 3.
【００２３】その結果、リング溝２の周囲に母材希釈等
の欠陥のない均一な銅系合金層３を形成することがで
き、耐摩耗性の向上に大きく貢献できることが確認でき
た。As a result, it was confirmed that a uniform copper-based alloy layer 3 having no defects such as dilution of the base material could be formed around the ring groove 2 and that it could greatly contribute to the improvement of wear resistance.
【００２４】[0024]
【発明の効果】請求項１に記載の発明によれば、ピスト
ンの外周面に形成した周溝に銅系合金材料の粉末を連続
供給しながらレーザビームを照射して、その粉末を溶融
させることによって肉盛り層を形成し、この肉盛り層に
機械加工を施してリング溝を形成するようにしたことに
より、銅の含有率が７０％以上でマトリックスが銅ベー
スの合金層をリング溝の周囲に形成できることから、ピ
ストンリングとの間の凝着摩耗を抑制して、耐摩耗性の
向上に大きく貢献できる効果がある。According to the first aspect of the present invention, the peripheral groove formed on the outer peripheral surface of the piston is irradiated with the laser beam while continuously supplying the powder of the copper alloy material to melt the powder. By forming a build-up layer by means of machining the build-up layer to form a ring groove, an alloy layer having a copper content of 70% or more and a matrix of copper base is formed around the ring groove. Since it can be formed, the adhesive wear between the piston ring and the piston ring can be suppressed and the wear resistance can be greatly improved.
【００２５】請求項２に記載の発明によれば、上記の周
溝の溝幅および溝深さがリング溝のそれよりも大きく形
成されているため、肉盛り層に機械加工を施すことによ
って形成されるリング溝の周囲には満遍なく銅系合金層
が形成されることとなって、上記の耐摩耗性が一段と向
上する。According to the second aspect of the present invention, since the groove width and groove depth of the circumferential groove are formed larger than that of the ring groove, the peripheral groove is formed by machining. Since the copper-based alloy layer is uniformly formed around the ring groove, the wear resistance is further improved.
【００２６】請求項３に記載の発明によれば、周溝の全
周に肉盛りする肉盛り加工を複数回行うことにより、よ
り大きな肉盛り層の厚みを確保できるほか、所定の厚み
の肉盛り層を一回の肉盛り加工で得る場合と比べて、母
材の溶融によってその母材が肉盛り層側に溶け込むいわ
ゆる母材希釈と称される欠陥を未然に防止することがで
き、肉盛り加工品質の向上が図れる。According to the third aspect of the present invention, a larger thickness of the built-up layer can be secured by performing the build-up processing for building up the entire circumference of the circumferential groove a plurality of times. Compared with the case of obtaining the build-up layer by one build-up process, it is possible to prevent a defect called so-called base material dilution in which the base material melts into the build-up layer side due to melting of the base material. It is possible to improve the processing quality.
【００２７】請求項４に記載の発明によれば、上記の肉
盛り加工を複数回行う際に一回の肉盛り加工ごとにその
都度ピストンを冷却させるようにしたことにより、後か
ら行う肉盛り加工時に前回の肉盛り加工時の熱的影響を
受けることがなくなり、母材希釈等の欠陥の発生をより
一層防止できるようになる。According to the fourth aspect of the invention, when the above-mentioned build-up processing is performed a plurality of times, the piston is cooled each time the build-up processing is performed once, so that the build-up processing to be performed later is performed. It is possible to prevent the occurrence of defects such as dilution of the base material even more during the processing without being affected by the thermal influence of the previous overlay processing.
【図１】本発明の一実施例を示す図で、（Ａ）は肉盛り
加工時の要部拡大断面図、（Ｂ）は同じくリング溝を加
工した後の要部拡大断面図。1A and 1B are views showing an embodiment of the present invention, in which FIG. 1A is an enlarged cross-sectional view of an essential part during overlay processing, and FIG. 1B is an enlarged cross-sectional view of an essential part after the ring groove is similarly processed.
【図２】本発明方法によって得られたピストン全体の一
部破断説明図。FIG. 2 is a partially broken explanatory view of the entire piston obtained by the method of the present invention.
【図３】従来のピストンの製造方法の一例を示す工程説
明図。FIG. 3 is a process explanatory view showing an example of a conventional piston manufacturing method.
１…ピストン １ａ…外周面 ２…リング溝 ３…銅系合金層 ４…周溝 ６…粉末 ７…レーザビーム ８，８ａ，８ｂ…肉盛り層 DESCRIPTION OF SYMBOLS 1 ... Piston 1a ... Outer peripheral surface 2 ... Ring groove 3 ... Copper alloy layer 4 ... Circumferential groove 6 ... Powder 7 ... Laser beam 8, 8a, 8b ... Build-up layer
Claims (4)
周面にその円周方向に沿って周溝を形成する工程と、 前記周溝に銅系合金材料の粉末を連続供給しながらレー
ザビームを照射するとともにピストンとレーザビームと
を相対移動させることにより、前記粉末を溶融させて周
溝に沿って肉盛り層を形成する工程と、 前記肉盛り加工後にその肉盛り層に機械加工を施して、
ピストンリングを装着するためのリング溝を形成する工
程、 とを含むことを特徴とするピストンの製造方法。1. A step of forming a circumferential groove on an outer peripheral surface of a piston made of an aluminum alloy along a circumferential direction thereof, and irradiating a laser beam while continuously supplying powder of a copper-based alloy material to the circumferential groove. By relatively moving the piston and the laser beam, a step of melting the powder to form a buildup layer along the circumferential groove, and subjecting the buildup layer to machining after the buildup processing,
A step of forming a ring groove for mounting a piston ring, and a method for manufacturing a piston.
にリング溝よりも大きく設定されていることを特徴とす
る請求項１記載のピストンの製造方法。2. The method for manufacturing a piston according to claim 1, wherein the circumferential groove has a groove width and a groove depth both larger than those of the ring groove.
層が形成されるのを一回として複数回行うことを特徴と
する請求項１または２記載のピストンの製造方法。3. The method for manufacturing a piston according to claim 1, wherein the build-up process is performed a plurality of times, once the build-up layer is formed on the entire circumference of the circumferential groove.
ごとに肉盛り層を含むピストン全体を冷却することを特
徴とする請求項３記載のピストンの製造方法。4. The method for manufacturing a piston according to claim 3, wherein when the build-up process is performed a plurality of times, the entire piston including the build-up layer is cooled each time.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7052155A JPH08246947A (en) | 1995-03-13 | 1995-03-13 | Manufacture of piston |
| US08/612,522 US5653021A (en) | 1995-03-13 | 1996-03-08 | Production process of a piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7052155A JPH08246947A (en) | 1995-03-13 | 1995-03-13 | Manufacture of piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08246947A true JPH08246947A (en) | 1996-09-24 |
Family
ID=12906972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7052155A Pending JPH08246947A (en) | 1995-03-13 | 1995-03-13 | Manufacture of piston |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5653021A (en) |
| JP (1) | JPH08246947A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984555A (en) * | 2021-04-14 | 2021-06-18 | 中国航发上海商用航空发动机制造有限责任公司 | Workpiece protection method, machining method and workpiece |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3547098B2 (en) * | 1994-06-06 | 2004-07-28 | トヨタ自動車株式会社 | Thermal spraying method, method for manufacturing sliding member having sprayed layer as sliding surface, piston, and method for manufacturing piston |
| JPH10141133A (en) * | 1996-11-05 | 1998-05-26 | Unisia Jecs Corp | Piston for internal combustion engine |
| DE19902864A1 (en) * | 1999-01-25 | 2000-06-29 | Daimler Chrysler Ag | Piston for IC engines with direct fuel injection has piston head cavity with collar partially formed by spray coating with a metal alloy for increased strength and temperature resistance |
| JP2002257045A (en) * | 2001-03-02 | 2002-09-11 | Toyota Industries Corp | Piston type compressor |
| DE50202059D1 (en) * | 2001-07-06 | 2005-02-24 | A I M L Gmbh | COOLABLE RING BRACKET FOR INTERNALLY COOLED PISTON RINGS AND METHOD FOR THE PRODUCTION THEREOF |
| DE102005034905A1 (en) * | 2005-07-26 | 2007-02-01 | Federal-Mogul Nürnberg GmbH | Method for producing a piston for an internal combustion engine and pistons for an internal combustion engine |
| DE102005047035B3 (en) * | 2005-09-30 | 2007-04-19 | Federal-Mogul Nürnberg GmbH | A method of manufacturing a piston for an internal combustion engine and piston produced thereafter |
| US8604381B1 (en) * | 2006-10-12 | 2013-12-10 | Purdue Research Foundation | Integrated laser material processing cell |
| DE102008048978A1 (en) * | 2007-09-26 | 2009-04-02 | Ks Kolbenschmidt Gmbh | Reinforcing an annular groove of a piston for an internal combustion engine |
| DE102008002572A1 (en) * | 2008-06-20 | 2009-12-24 | Federal-Mogul Nürnberg GmbH | Method for producing a piston for an internal combustion engine and pistons for an internal combustion engine |
| BR112015025346A2 (en) | 2013-04-05 | 2017-07-18 | Federal Mogul Corp | piston produced through the use of additive manufacturing techniques |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3533329A (en) * | 1968-01-09 | 1970-10-13 | Ercole Galli | Method for manufacturing light alloy pistons with an insert of a different metal,and pistons manufactured thereby |
| US4074616A (en) * | 1975-09-02 | 1978-02-21 | Caterpillar Tractor Co. | Aluminum piston with steel reinforced piston ring grooves |
| JPS54150510A (en) * | 1978-05-16 | 1979-11-26 | Mazda Motor Corp | Piston in aluminum alloy |
| DE2835332C2 (en) * | 1978-08-11 | 1982-06-24 | Messer Griesheim Gmbh, 6000 Frankfurt | Piston with an aluminum alloy body |
| US4233490A (en) * | 1979-06-20 | 1980-11-11 | Shalai Alexandr N | Method of reinforcing aluminium alloy piston ring groove |
| GB2094934B (en) * | 1979-07-19 | 1983-06-02 | Ass Eng France | The reinforcement of piston ring grooves |
| WO1982003814A1 (en) * | 1981-04-28 | 1982-11-11 | Plc Ae | Piston manufacture |
| DE3339867A1 (en) * | 1982-12-16 | 1985-05-15 | Kolbenschmidt AG, 7107 Neckarsulm | METHOD FOR THE PRODUCTION OF WEAR-RESISTANT SURFACES OF THE RING GROOVES OF PISTONS, MADE OF ALUMINUM ALLOYS, FOR INTERNAL COMBUSTION ENGINES |
| JPS6141731A (en) * | 1984-08-06 | 1986-02-28 | Toyota Motor Corp | Manufacture of piston |
| JPS63318365A (en) * | 1987-06-19 | 1988-12-27 | Atsugi Motor Parts Co Ltd | Piston |
| JPH0227149A (en) * | 1988-07-14 | 1990-01-29 | Mitsubishi Automob Eng Co Ltd | Al alloy piston |
| JPH02125952A (en) * | 1988-11-04 | 1990-05-14 | Mitsubishi Motors Corp | Piston for internal combustion engine |
| JP2679245B2 (en) * | 1989-05-22 | 1997-11-19 | いすゞ自動車株式会社 | Method for manufacturing fiber-reinforced metal machine element |
| GB2294102B (en) * | 1993-12-04 | 1996-06-26 | Ae Goetze Automotive Limited | Fibre-reinforced metal pistons |
| US5515770A (en) * | 1994-12-05 | 1996-05-14 | Clark Industries, Inc. | Piston having laser hardened primary compression ring groove and method of making same |
-
1995
- 1995-03-13 JP JP7052155A patent/JPH08246947A/en active Pending
-
1996
- 1996-03-08 US US08/612,522 patent/US5653021A/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984555A (en) * | 2021-04-14 | 2021-06-18 | 中国航发上海商用航空发动机制造有限责任公司 | Workpiece protection method, machining method and workpiece |
Also Published As
| Publication number | Publication date |
|---|---|
| US5653021A (en) | 1997-08-05 |
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